diff --git a/content/docs/py2go/module-04-structs-interfaces.mdx b/content/docs/py2go/module-04-structs-interfaces.mdx
index c1116f2..55c595f 100644
--- a/content/docs/py2go/module-04-structs-interfaces.mdx
+++ b/content/docs/py2go/module-04-structs-interfaces.mdx
@@ -171,13 +171,20 @@ import (
     "fmt"
 )
 
+// encoding/json tag options (after the field name, comma-separated):
+//   omitempty  - omit the field when it holds the zero value
+//   string     - marshal numbers/bools as JSON strings
+//   omitzero   - omit the field when zero (Go 1.24+)
+//   "-"        - never include this field
+// Unknown options are silently ignored, so typos won't produce errors.
+
 type User struct {
     ID       int    `json:"id"`                    // JSON key
     Name     string `json:"name"`                  // JSON key
-    Email    string `json:"email,omitempty"`       // Omit if empty
+    Email    string `json:"email,omitempty"`       // Field name + omitempty option
     Password string `json:"-"`                     // Never in JSON
-    Internal string `json:"internal,internal"`     // Multiple options
-    DBName   string `db:"user_name" json:"name"`  // Multiple tags
+    Internal string `json:"internal,omitempty"`    // Field name + omitempty option
+    DBName   string `db:"user_name" json:"db_name"` // Multiple tags
 }
 
 func main() {
@@ -186,14 +193,14 @@ func main() {
         Name:     "Alice",
         Email:    "alice@example.com",
         Password: "secret",
-        Internal: "internal_data",
+        Internal: "",
         DBName:   "alice_db",
     }
 
     // JSON encoding respects tags
     jsonBytes, _ := json.Marshal(user)
     fmt.Println(string(jsonBytes))
-    // Output: {"id":1,"name":"Alice","email":"alice@example.com","internal":"internal_data"}
+    // Output: {"id":1,"name":"Alice","email":"alice@example.com"}
 }
 ```
 </UniversalEditor>
diff --git a/content/docs/py2go/module-04-structs-interfaces.zh-cn.mdx b/content/docs/py2go/module-04-structs-interfaces.zh-cn.mdx
index 4a9ae4e..4f696ee 100644
--- a/content/docs/py2go/module-04-structs-interfaces.zh-cn.mdx
+++ b/content/docs/py2go/module-04-structs-interfaces.zh-cn.mdx
@@ -171,13 +171,20 @@ import (
     "fmt"
 )
 
+// encoding/json 标签选项（在字段名之后，用逗号分隔）：
+//   omitempty  - 当字段为零值时省略该字段
+//   string     - 将数字/布尔值编码为 JSON 字符串
+//   omitzero   - 当字段为零时省略（Go 1.24+）
+//   "-"        - 完全忽略该字段
+// 未知选项会被静默忽略，因此拼写错误不会报错。
+
 type User struct {
     ID       int    `json:"id"`                    // JSON 键
     Name     string `json:"name"`                  // JSON 键
     Email    string `json:"email,omitempty"`       // 如果为空则省略
     Password string `json:"-"`                     // 从不在 JSON 中
-    Internal string `json:"internal,internal"`     // 多个选项
-    DBName   string `db:"user_name" json:"name"`  // 多个标签
+    Internal string `json:"internal,omitempty"`    // 字段名 + omitempty 选项
+    DBName   string `db:"user_name" json:"db_name"` // 多个标签
 }
 
 func main() {
@@ -186,14 +193,14 @@ func main() {
         Name:     "Alice",
         Email:    "alice@example.com",
         Password: "secret",
-        Internal: "internal_data",
+        Internal: "",
         DBName:   "alice_db",
     }
 
     // JSON 编码会遵守标签
     jsonBytes, _ := json.Marshal(user)
     fmt.Println(string(jsonBytes))
-    // 输出: {"id":1,"name":"Alice","email":"alice@example.com","internal":"internal_data"}
+    // 输出: {"id":1,"name":"Alice","email":"alice@example.com"}
 }
 ```
 </UniversalEditor>
diff --git a/content/docs/py2go/module-04-structs-interfaces.zh-tw.mdx b/content/docs/py2go/module-04-structs-interfaces.zh-tw.mdx
index 5fae904..a69636c 100644
--- a/content/docs/py2go/module-04-structs-interfaces.zh-tw.mdx
+++ b/content/docs/py2go/module-04-structs-interfaces.zh-tw.mdx
@@ -171,13 +171,20 @@ import (
     "fmt"
 )
 
+// encoding/json 標籤選項（在欄位名稱之後，用逗號分隔）：
+//   omitempty  - 當欄位為零值時省略該欄位
+//   string     - 將數字/布林值編碼為 JSON 字串
+//   omitzero   - 當欄位為零時省略（Go 1.24+）
+//   "-"        - 完全忽略該欄位
+// 未知選項會被靜默忽略，因此拼寫錯誤不會報錯。
+
 type User struct {
     ID       int    `json:"id"`                    // JSON 鍵
     Name     string `json:"name"`                  // JSON 鍵
     Email    string `json:"email,omitempty"`       // 如果為空則省略
     Password string `json:"-"`                     // 從不在 JSON 中
-    Internal string `json:"internal,internal"`     // 多個選項
-    DBName   string `db:"user_name" json:"name"`  // 多個標籤
+    Internal string `json:"internal,omitempty"`    // 欄位名稱 + omitempty 選項
+    DBName   string `db:"user_name" json:"db_name"` // 多個標籤
 }
 
 func main() {
@@ -186,14 +193,14 @@ func main() {
         Name:     "Alice",
         Email:    "alice@example.com",
         Password: "secret",
-        Internal: "internal_data",
+        Internal: "",
         DBName:   "alice_db",
     }
 
     // JSON 編碼會遵守標籤
     jsonBytes, _ := json.Marshal(user)
     fmt.Println(string(jsonBytes))
-    // 輸出: {"id":1,"name":"Alice","email":"alice@example.com","internal":"internal_data"}
+    // 輸出: {"id":1,"name":"Alice","email":"alice@example.com"}
 }
 ```
 </UniversalEditor>